I N S T R U C T I O N M A N U A L GAS CYLINDER LIFTS The LM Series gas cylinder lifts are smooth, quiet reliable lift mechanisms for your valuable equipment in a mobile application. The LM Series can be adjusted to accommodate a total payload ranging from 100 to 352 pounds and, depending on the selected model, provide up to 42 1/4 inches of travel. The patented lift mechanism of the LM Series gas cylinder lift allows you to raise your equipment by applying a gentle upward motion. To lower the equipment for storage or shipping, simply apply a gentle downward push. Heavier or lighter payload weight will require proportionate manual effort to raise or lower your equipment. BEFORE YOU BEGIN CAUTION: To prevent damage to the LM Series, which could affect or void the Factory warranty, thoroughly study all instructions and illustrations before you begin to install or operate the unit. Pay particular attention to the Important Precautions on Page 1. If you have any questions about this installation, contact Chief Manufacturing at 1-800-582-6480. LOGO CHIEF MANUFACTURING INC. 1-800-582-6480 952-894-6280 FAX 952-894-6918 12800 HIGHWAY 13 SOUTH, SUITE 500 SAVAGE, MINNESOTA 55378 USA PART NO. 8808-000004 (Rev. B) 2000 Chief Manufacturing www.chiefmfg.com Printed in USA 02-04
IMPORTANT WARNINGS AND CAUTIONS! WARNING: CAUTION: A WARNING alerts you to the possibility of serious injury or death if you do not follow the instructions. A CAUTION alerts you to the possibility of damage or destruction of equipment if you do not follow the corresponding instructions. WARNING: Be aware during the installation mechanism. WARNING: Be aware of the potential for personal injury or damage to the unit if it is not adequately mounted. WARNING: Be sure the lift is installed square and parallel in all dimensions to avoid damage to the lift. Avoid stressing the unit at any time during installation. WARNING: Do not place a combined weight exceeding the maximum support weight on your lift (see Table 1 ). Exceeding the maximum support weight may cause the lift to lower rapidly and could cause serious personal injury or damage to equipment. CAUTION: Test the unit for shipping damage. TOOLS REQUIRED FOR INSTALLATION Phillips screwdrivers, No. 1 and No. 2 Electric drill and bit set Socket set with extension NOTE: Other tools may be required depending on the method of installing the unit in the ceiling. CONTENTS WEIGHT AND VERTICAL TRAVEL SPECIFICATIONS... 2 LIFT CASE DESIGN SPECIFICATIONS... 3 LIFT INSTALLATION PREPARATION... 4 LIFT INSTALLATION... 6 Install the Lift Into the Case... 6 Install the Shelf on the Lift Mechanism 7 TROUBLESHOOTING... 8 1
WEIGHT AND VERTICAL TRAVEL SPECIFICATIONS See Table 1 for weight and vertical travel specifications. Maximum release weight is the weight the lift mechanism will lift unassisted, minimum release weight is the weight that must be on the lift mechanism to lift without excessive speed, and maximum support weight is the total weight (equipment, shelf, and all hardware) that the lift mechanism will support. 1. Determine size and weight of equipment to be lifted. 2. Determine the vertical travel height required for presentation viewing. 3. Determine length, depth, and thickness of the shelf to support the weight of your equipment (minimum required shelf size is 24 X33 X5/8 thick plywood). Table 1: Weight and Vertical Travel Model LM-21 LM-21/DC LM-42 LM-42/TC Dimensions (HxWxD) 6 1/2 x33 x15 (165mmx838mmx381mm) 6 1/2 x33 x15 (165mmx838mmx381mm) 10 1/4 x33 x18.5 (260mmx838mmx470mm) 10 1/4 x33 x18.5 (260mmx838mmx470mm) Overall Height Extended 28 711mm 28 711mm 52 1/2 1334mm 52 1/2 1334mm Vertical Travel 21 1/2 546mm 21 1/2 546mm 42 1/4 1073mm 42 1/4 1073mm Max. Release Weight +\- 5% 170 lbs. 77 Kgs. 352 lbs. 160 Kgs. 157 lbs. 71 Kgs. 256 lbs. 116 Kgs. Min. Release Weight +\- 5% 100 lbs. 45 Kgs. 207 lbs. 94 Kgs. 90 lbs. 41 Kgs. 148 lbs. 67 Kgs. Max. Support Weight +\- 5% 200 lbs. 91 Kgs. 400 lbs. 181 Kgs. 183 lbs. 83 Kgs. 280 lbs. 127 Kgs. Weight Adjust ability +\- 5% 70 lbs. 32 Kgs. 145 lbs. 66 Kgs. 67 lbs. 30 Kgs. 108 lbs. 49 Kgs. Unit Weight 56 lbs. 25 Kgs. 60 lbs. 27 Kgs. 84 lbs. 38 Kgs. 86 lbs. 39 Kgs. 2
LIFT CASE DESIGN SPECIFICATIONS The following case design specifications are the minimum required specifications. 1. Minimum of 3/4 thick caster board completely covering the bottom of the case. 2. Minimum case inside dimensions: LM-21, LM-21/DC - 26 depth x 37 length (I.D.) LM-42, LM-42/TC - 27 depth x 37 length (I.D.) 3. The part line of case must be at shelf height when lift mechanism is 1 from fully compressed (see Figure 1). 4. The lower portion of case must have foam blocks (see Figure 1 and Figure 6) made from 2.4# dense foam to act as shock absorption for the equipment, shelf, and lift mechanism. A minimum of four corner pieces, supporting the bottom of the shelf, must be: LM-21 - Height 7 1/2, Length 12 LM-42 - Height 11 1/4, Length 12 Model Dimension X LM-21 1 LM-21DC 1 LM-42 4 3/4 LM-42DC 4 3/4 Hold-Down Shaft (LM-21 = HDP-11) (LM-21DC = HDP-11) (LM-42 = HDP-15) (LM-42DC = HDP-15) 1 Distance to crosspin when bottom of shelf contacts foam X When bottom of shelf contacts foam, the distance between mechanism shells equals X dimension. Recommended Part Line Corner Pieces of Foam Figure 1. Case 3
LIFT INSTALLATION PREPARATION 1. Carefully inspect the lift for shipping damage. If any damage is apparent, call your carrier claims agent and do not continue with the installation until the carrier has reviewed the damage. NOTE: Read all assembly instructions before starting assembly. 2. Place the mechanism on a clean, level floor in its upright (label side up) position. mechanism. 3. Lifting on the label end, pull the lift mechanism upward to its maximum height. 4. Make sure the gas spring engages, keeping the mechanism in the raised position (see Figure 2). 5. Place adequate amount of weight (see Minimum Release Weight in Table 1) on top of panel of the lift mechanism. 6. Make sure the mechanism is adjusted to its proper weight adjustment. If necessary, use a 1/2 open end wrench to adjust weight setting (see Figure 3). 7. Install stop bumpers as follows: Perform the following steps if the lift mechanism has the optional height adjuster (HA-21) installed: mechanism a. Apply downward pressure on top of panel of the lift mechanism to slowly compress unit. b. Apply sufficient downward pressure to lift mechanism to engage pawl block to height adjuster (see Figure 4). Gas spring engages, keeping mechanism raised Figure 2. Gas Spring Engaged Figure 3. Weight Setting HA-21 Height Adjuster Pawl Block Figure 4. Pawl Block and Height Adjuster 4
c. Install stop bumpers (see Figure 5) at location described on label on sides of base. mechanism d. Apply downward pressure until the unit has reached the bottom of travel. The height adjuster will automatically reset. Perform the following steps if the lift mechanism does not have the optional height adjuster (HA-21) installed: a. Make a stop block. The minimum material requirement for a stop block is a 2 x4 x8 piece of wood or preferably a 4 x4 x8 wooden block. Figure 5. Stop Bumper mechanism b. Apply downward pressure on top of panel of the lift mechanism to slowly compress unit until the stop block will fit between the middle brace support and support beam on the outside scissors leg (see Figure 6). c. Install stop bumpers (see Figure 5) at location described on label on sides of base. mechanism Figure 6. Stop Block d. Apply downward pressure on top of panel the lift mechanism and remove the stop block. points for people and for electrical wiring. Keep hands and electrical wiring away from internal components of the mechanism 7. Using an upward pull, raise the mechanism to its maximum height. Remove the weight from the mechanism. 5
INSTALL THE LIFT Because of the wide variety of possible mounting situations, Chief Manufacturing can only provide general guidelines for lift installation. Study the following information carefully, and adapt it as necessary to fit your specific installation. Install the Lift Into the Case 1. Place the lift mechanism into the case with the end of the mechanism with the hold-down shaft clearance hole (opposite from end with label marked Lift Here to Engage ) *3/4 from inside case wall (see Figure 6). 2. While maintaining the 3/4 dimension in the previous step, center the lift in the depth direction. 3. With the lift centered, use the base of the lift mechanism as a template to transfer 6 holes (17/64 diameter) and 1 hole (3/4 diameter) to the case bottom (see Figure 6). 4. Remove the lift mechanism from the case. 5. Drill through 6 transfer holes (17/64 diameter) and 1 hole (3/4 diameter) through the case bottom and casterboard. Model X Length LM-21 35 LM-42 37 Figure 7. Bottom Shell 6
6. Pre-adjust lift mechanism using adjustment shaft (see Figure 2) for total weight of the load that will be supported by the mechanism. Adjustment can be made in the raised position only. CAUTION: Foam must contact shelf at least 1 before the lift mechanism is fully compressed. The case bottom is foamed to provide a required shock system for the equipment, lift mechanism, shelf and case bottom. 7 Secure the foam in the lower portion of the case as required (On Model LM-21 only, be sure the foam does not interfere with the access hole for adjustment tool). 8. After adjustment of the lift mechanism, secure mechanism in case using holes drilled and hardware provided Install the Shelf on the Lift Mechanism 1. Make sure the shelf will not collide with the case bottom when mechanism is collapsed 2. Secure the shelf to top of lift using holes provided, 6 hex bolts, 12 washers, and six hex nuts. 3. Drill a 5/8 diameter hole through the shelf for clearance of the hold-down shaft (see Figure 7). 4. Using two hex nuts and four flat washers, install the hold-down shaft as shown in Figure 7. CAUTION: On Models LM-42 and LM-42/TC only, lock knobs on stabilizer bars must be loosened to lower mechanism. 5. With the mechanism compressed and the shelf resting on the foam in the bottom of the case, adjust the hold-down shaft so that the crosspin is 1 from the top shelf (see Figure 1). 6. Clean and remove all construction debris from the lift mechanism. Figure 8. Hold-Down Shaft Installation 7
TROUBLESHOOTING If the Lift is installed according to these instructions, it should operate trouble-free indefinitely. If you do encounter a problem, call the Technical Services Department at Chief Manufacturing: 1-800-582-6480 952-894-6280 8